用于处理聚合物驱采出水的新型絮凝剂的合成与絮凝。

Synthesis and flocculation of a novel flocculant for treating wastewater produced from polymer flooding.

机构信息

School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People's Republic of China.

Beijing Research Center of China National Offshore Oil Corporation, Beijing, People's Republic of China.

出版信息

Environ Technol. 2021 Apr;42(11):1715-1722. doi: 10.1080/09593330.2019.1677785. Epub 2019 Oct 20.

DOI:10.1080/09593330.2019.1677785

PMID:31590601

Abstract

Preparation of a flocculant which can have high-oil removal and no viscous flocs production for treating oily wastewater produced from polymer flooding (OWPF) is meaningful work. In this paper, a novel flocculant (denoted as PDCDM) for treating OWPF was prepared by copolymerization of dodecyl dimethylallyl ammonium chloride (CDM) and dimethyl aminopropyl methacryamide (DMAPMA). By using oil removal and viscous floc production as indexes, the synthesis condition of PDCDM was optimized. The optimum PDCDM had an oil removal of 98.8% and a viscous floc production decrease of 62.86% compared with commercial cationic flocculant. Measurement of zeta potential, surface tension, interfacial tension, interfacial film strength and dual polarization interferometry tests were carried out for investigating the flocculation mechanism of PDC12DM. The results showed that PDCDM can destroy oil droplet stability by electrostatic charge neutralization and demulsification together. Especially, demulsification mechanism is helpful for reducing the viscous floc.

摘要

制备一种可高效去除油污且不产生粘性絮体的絮凝剂，用于处理聚合物驱采油（OWPF）产生的含油废水，是一项有意义的工作。本文通过共聚十二烷基二甲基烯丙基氯化铵（CDM）和二甲氨基丙基甲基丙烯酰胺（DMAPMA），制备了一种用于处理 OWPF 的新型絮凝剂（记为 PDC12DM）。以除油率和粘性絮体生成率为指标，优化了 PDC12DM 的合成条件。与商业阳离子絮凝剂相比，最佳 PDC12DM 的除油率为 98.8%，粘性絮体生成率降低了 62.86%。通过测量 ζ 电位、表面张力、界面张力、界面膜强度和双偏振干涉试验，研究了 PDC12DM 的絮凝机理。结果表明，PDC12DM 可以通过静电中和和破乳共同破坏油滴的稳定性。特别是，破乳机理有助于减少粘性絮体的生成。